sidle



(Modal.)

J. W. SIDLE.

` Turn Table for Mounting Murfoscpio Objects.

No. 235,030. Patented Nov. 30,1880.

@3, ATTORNEY WITNESSES N. PErERS. PHDTDL1THOGRAPHER, WASHINGTON. D C.

UNITED STATES PATENT OFFICE.-

JOHN V. SIDLE, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO J. W.

" SIDLE 85 OO., OF SAME PLAGE.

TURN-TABLE FOR MOUNTING MICROSCOPIC OBJECTS.

SPECIFICATION forming part of Letters Patent No. 235,030` dated November30, 1880.

Application filed August 31, 1880. (Model.)

To all whom it may concern Be it known that I, JOHN lV. SIDLE, ofPhiladelphia, in the county of Philadelphia and State of Pennsylvania,have invented a new and valuable Improvement in Turn-Tables for MountingMiscroscopic Objects and I do hereby declare that the following is afull, clear, and exact description of the construction and operation ofthe same, reference being had to the annexed drawings, making a part ofthis specification, and to the letters and iigures of reference markedthereon.

Figure l of the drawings is a representation of a central verticalsection of this invention. Fig. 2 isa top view, and Fig. 3 is a bottomview, of the turn-tableplate.

This invention has relation to self-centerin g turn-tables for mountingmicroscopic objects and it consists in the construction and novelarrangement of the disk-boss on the under side of the fixed portion ofthe stand and the detachable double leg or forked support having aconcave head, the under extension of the frame below the diskboss, andthe clampscrew; also, of the circularly-recessed turn-table and theclampplates set therein flush with the surface of the turn-table, and inconnection therewith the side pinions and the center wheel having arecessed body and milled collar, and the spring set in the recess of thebody and connected with said body and with the turn-table, whereby theclamp-plates are automatically turned toward each other, all ashereinafter shown and described.

In the accompanying drawings, the letter A designates the fixed portionofthe stand, having a concave edge at one end next the turntable.

B represents the under brace or frame, extending downward and having anarm or extension, C, under the stand, extending toward that end which isfarthest from the concave edge, and an arm or extension, D, extending inthe opposite direction under the turn-table E. Above the arm O, on themain rib of the frame, is formed a horizontal disk-boss, a, and throughthe end of said arm, engaging a threaded perforation, b, therein,extends the clamp-screw F, having a conicalend and milled head, andserving', in connection with the diskboss, to fix the stand to the edgeof atable, when desired, this being very desirable in operating uponmicroscopic objects and slides, because ot' the firm position of thestand which is attained. At the same time the broad diskboss is notliable to injure the surface of the table.

When a movable stand is desired the doubleleg attachment G is employed,consisting of a concave or rimmed head, H, and two oblique legs, K,extending downward therefrom. The head H isformed with a notch,c, in itsrimmed edge, which engages the rib B ot' the frame and fixes itsposition when its rimmed head is applied on the disk-boss a, theattachment being secured to the stand by means of the clampscrew F,which engages a bearing, d, on the under side of the head. The legs K,together with the supporting-arm D under the turn-table, form atripod-support for the stand.

The turn-table E is upon its Lipper surface marked with concentriccircles at its central portion, as shown at c, and is formed withcircular recesses g on each side, pert'oratious h being made through thedoors or bottoms of these recesses for the passage of the journals 7s ofthe rotary clamp plates L, to each of which is secured, on the underside ofthe turntable, a pinion, N, by means of a screw, l, entering athreaded hole in the journal 7c.

The spindle or pivot-post P of the turn-table has its lower end screwedin a bearing', m, on the extension D, and it is provided with a sleeve,T, having milled collar n. The sleeve T extends up through the box p ofthe large toothed center wheel, R, and is provided with a threaded end,which is screwed into a boss, q, on the under side ofthe turn-table. Onthe exterior of the body or box p is a milled collar, r, whereby it canbe turned when necessary. Within it is formed a recess, c, openingupward to receive the center boss, q, et the turntable, and formingbelow this boss a chamber, t, in which is seated a spiral spring, s, theupper and lower ends ot' which engage each with Aone of a series ofpert'orations, z, made in the center boss of the turn-table and in thedoor fw of the recess in the box 19, respectively.

The large center wheel, Ii, engages on opposite sides the pinions N; andthe clamp-plates L, to which the latter are attached, are provided eachwith a right-angle clamp or jaw, I, which is pivoted eceentrically ornear the margin of the clamp-plate. Vhen the boX p is turned by means ofits milled. collar the jaws I are carried away from each other, so thatthe microscopic slide can be placed on the turntable between them, theaction of the spring when the box is released causing the Wheel andpinions to carry the jaws toward each other, so that they willautomatically engage the corners of the slide, which should be arrangedin juxtaposition, and Will center the slide with reference to the centerof the turntable, the latter having been duly marked with concentriccircles, as aforesaid.

rEhe ordinary spring-clamps can be conveniently applied to thisturn-table, as indicated zo at V.

Having described this invention, what I claim, and desire to secure byLetters Patent, 1s-

In a turn-table for mounting microscopic 0bjects, the Combination, withthe supportingarm D, the opposite arm C, having a threaded perforation,and the disk-boss o on lthe framerib,oi1 the detachable double leg G,its rimmed head I-I, having the notch c and recess d, and theclamp-screw F, substantially asspecied.

In testimony that I claim the above I have hereunto subscribed my namein the presence ot' tWowitnesses.

JOHN W. SIDLE.

Witnesses AL. P. BUROHELL, ALLEN N. GANGEWER.

